The ex 7 and above were redesigned for 07. My guess is that would decrease the value of the old ones even more. Can you trust how much it has actually been used?

I saw a demo model 2006 ex8 at the toronto bike show being sold by a dealer for 1250 canadian. It was so low that I thought the price was wrong. It looked in great condition to me and i was surprised by the price. As for one a year older offer a low amount and see if they take it.

Also remember that buying it used it will invalidate the lifetime frame warranty. So if you break frames you might want to think twice.